Add csv command

1 files changed, 30 insertions, 0 deletions

diff --git a/csv/csv.ha b/csv/csv.ha
new file mode 100644
index 0000000..40e1e3b
--- /dev/null
+++ b/csv/csv.ha
@@ -0,0 +1,30 @@
+use io;
+use strings;
+use fmt;
+
+export type error = !(str | io::error);
+
+export fn writerecord(w: io::handle, record: []str, separator: const str = ",", quote: const rune =
+	'"') (void | error) = {
+	let sep = "";
+	for (const field .. record) {
+		if (strings::contains(field, separator)) {
+			if (strings::contains(field, quote)) {
+				return "ERROR: Field contains quote character
+					(not supported)";
+			};
+			fmt::fprintf(w, "{}{}{}{}", sep, quote, field, quote)!;
+		} else {
+			fmt::fprintf(w, "{}{}", sep, field)!;
+		};
+		sep = separator;
+	};
+	fmt::fprintln(w)!;
+};
+
+export fn writerecords(w: io::handle, records: [][]str, separator: const str = ",", quote: const
+		rune = '"') (void | error) = {
+	for (const record .. records) {
+		writerecord(w, record, separator, quote)?;
+	};
+};